IIYJIEXOPTEROUS PARASITES. 1891 



Specimens of tliis form have been reared as follows : from Heraclides 

 cresphontes by ^Y . II. Edwards, A. H. Mundt and Professor Riley ; from 

 Euphoeades palamedes by Professor Riley ; fi.-om Ascia monuste by Professor 

 Riley ; from Polygonia comma by myself; from Evanessa antiopa by many 

 observers ; from Polygonia interrogationis by many observers. 



Fteromalus archippi sp. nov. PL 80, fig 3. 



Female. — Resembles hi size and coloration P. pnparum var. vanessae, except that all 

 femora are hone\--}-ellow, instead of darlv brown or metallic. The pnnctation of the 

 notum is deeper and closer and is identical on all segments. The nucha of the metano- 

 tnm is scarcely elevated and is not at all globose; the median carina is faintly indi- 

 cated, and the spiraciilar snlci are very deep, much curved and reach about half way 

 to the acetabulum. 



Described from three female specimens sent by Prof. A. J. Cook to 

 Professor Riley, and reared September 13, 1887, from a chrysalis of Anosia 

 plexippus. A note concerning the rearing has been published by Mr. C. 

 P. Gillette in the Canadian Entomologist for July, 1888 (p. 133), in 

 which he states that over fifty specimens of the parasite issued on the 

 above date from a single chrysalis of plexippus. 



Genus DEROSTENUS Westwood. 



Face usually sunken after death; vertex rarely acute, smooth; eyes large, usually 

 hairy, usually emarginate interiorly; antennal grooves often furcate, sending a branch 

 to the inner side of each orbit. Antennae inserted below middle of face ; scape wholly 

 or partly pale ; ring joint usually distinct ; funicle 3-jointed; club rarely two-jointed 

 with both sexes. Pronotnm plain, anterior margin acute ; parapsidal sutures indistinct ; 

 sculpture faint, rarely sulwquamous ; raetanotum often cariuate. Wings ample, sub- 

 cuneiform ; costa longer than marginal ; stigmal short, postmarginal usually longer, 

 but rarely absent. 



Derostenus antiopae (Packard). PI. 89, fig. 7. 



JEntedon antiopae Packard. 



Male. — Postmarginal vein distinct. Scutellnm with no median groove. Abdomen 

 rotund, with a very short petiole. Scape of antennae long, cylindrical ; flagellum with 

 short hairs. Eyes slightly emarginate, not hairy. General color shining black; anten- 

 nae with brown club and funicle, scape, pedicel and ring-joint yellow; all legs yellow 

 (coxae cannot be seen) ; metanotnm and petiole yellow-brown. Length, l.G mm. 



The only specimen of this parasite known is a male. It is in poor con- 

 dition and very dusty, and is glued firmly to a large card. It is marked 

 " 477," and is said to be from the old Harris collection. As its specific 

 name indicates, it was reared from Euvanessa antiopa. 



Genus CIRROSPILUS Westwood. 



Head transverse ; vertex not broad ; eyes sparsely pubescent ; gcnal sulcus distinct ; 

 clypeus not denticulate at apex ; antennae inserted far below middle of face, distant at 

 base, funicle 2-jointed, club 3-jointed. Thorax subdepressed above, pronotum not 



